Liquefied air separation FAQ - DEAR Air Separation

Effective energy analysis of liquid air separation plant cold energy utilisation

Effective energy analysis is an important analytical method for energy systems. liquid air separation plant is a low-temperature liquid mixture with methane as the main component, including nitrogen, ethane, propane and other components, which has a large temperature difference and pressure with the outside world. liquid air separation plant is a low temperature liquid and its temperature rise is accompanied by phase change heat, so its cold energy is divided into sensible heat and lat...

Mar 31, 2022

Liquid air separation plant circulating water systems design and operation management

Water evaporation, wind-blown losses and other situations occurring in industrial circulating cooling water system operation, resulting in the continuous concentration of circulating water, then the salts contained therein exceed the standard, anions and cations increase, PH value changes significantly, resulting in the deterioration of water quality. The temperature of the circulating water rises and the PH value and nutrients increase, which is conducive to the reproduction of microorganisms. ...

Mar 30, 2022

The future of liquid air separation plant cold energy utilisation

With the rapid growth of liquid air separation plant production and sales, and the global energy crunch, the prospects for the use of liquid air separation plant cold energy are very broad. The use of liquid air separation plant cold energy should be developed in the direction of integration, fully integrated and effective use of liquid air separation plant cold energy liquid air separation units, using circulating nitrogen through the heat exchanger to recycle liquid air separation plant cold, ...

Mar 29, 2022

Liquid air separation plant cold energy composition

The relative values of low temperature effective energy and pressure effective energy are variable and the application of liquid air separation plant cold energy is based on the specific use of liquid air separation plant, combined with specific processes to effectively recover liquid air separation plant. In fact the essence of liquid air separation plant cold energy utilisation is the transfer of liquid air separation plant cold to the mass to be cooled to achieve the ...

Mar 23, 2022

Brief description of the principle of liquid air separation plant

Another part of the nitrogen vaporized in the liquefier is heated up to a certain temperature in the high pressure heat exchanger and pumped out to the low pressure nitrogen press, the nitrogen separated by the gas-liquid separator is also heated up by the high pressure heat exchanger and then goes to the low pressure nitrogen press, compressed to a certain pressure by the low pressure nitrogen press and then back to the high pressure heat exchanger for heat exchange with liquid air separat...

Mar 22, 2022

The amount of circulating nitrogen required for a liqued air separation plant

The liqued air separation plant cooling capacity is cooled between the air compressor and the nitrogen compressor, resulting in a significant reduction in energy consumption and a 50% saving in energy consumption. At the same time the introduction of liqued air separation plant cold capacity eliminates the chiller, expander, but increases the cold balance of the liquefier, in the heat transfer calculation is more difficult in low temperature conditions, the performance of the fluid changes more ...

Mar 21, 2022

Advantages of the liquid air separation plant

In the liquid air separation plant, the cooled refrigerant goes to the air machine through the refrigerant delivery pipeline, and the intercooler cools the compressed air to around 10°C, improving the efficiency of the air compressor and reducing the energy consumption of the air compressor. The air separation unit uses circulating nitrogen to recycle and utilise the CNG cold through a heat exchanger, which in turn liquefies the air to transfer the cold to the liquid air separation plant, an...

Mar 17, 2022

Non-electricity consuming solutions for LNG liquid air separation plants

The non-power consuming option for liquid air separation plants can be used for full liquid air separation plants，where the produced liquid is sold off. This approach is currently available for most LNG receiving stations. For air separation units with a large cold capacity, the liquid air can be pressurised to 6baA in a vacuum storage tank, and then heat exchanged through a heat exchanger, instead of the air compressor, directly into the cold box for distillation. At the same time in the cold b...

Mar 16, 2022

What are the characteristics and requirements of oxygen piping for liquid air separation plant?

The oxygen piping of liquid air separation plant has the following characteristics: One, high oxygen purity, the purity of oxygen produced by the liquid air separation plant ≥ 99.6%. Two, is the oxygen transport pipeline pressure, high pressure oxygen operating pressure at 8.77MPa. Third, is with the general characteristics of gas piping, the local airflow speed is fast, reaching 200 m / s. According to the characteristics of the oxygen pipeline requires that The appearance of the pipe...

Mar 15, 2022

How to arrange the piping in the liquid tank area of liquid air separation plant?

Liquid air separation plant liquid hub area piping arrangement is mainly oxygen, nitrogen, argon liquid pipeline and pump box in the liquid pipeline arrangement. As oxygen, nitrogen, argon liquid temperature is extremely low (liquid oxygen -183 ° C ℃, liquid nitrogen -196 ° C, argon liquid -185.7C), in the liquid flow process, resulting in a certain amount of gasification, piping should pay attention to the slope of the liquid pipeline towards (no slope requirements on the process). In ...

Mar 14, 2022

Liquid air separation plant piston compressor residual volume

Liquid air separation plant piston compressor clearance volume is: the compressor at the end of the exhaust, the piston and the cylinder end of the wall between the residual part of the high pressure gas occupied by the cylinder volume. The existence of the residual volume directly reduces the exhaust volume of the compressor, at the same time, the suction of this part of the high pressure gas expansion, will also cause a delay in the suction process, the reduction in suction volume, ultimately ...

Mar 09, 2022

Advanced features of liquid air separation plants

Liquid air separation plants save the investment and electricity consumption of seawater gasifiers, pumps or combustion vaporisers, and also allow access to liquefied air. The liquefied air is stored in a storage tank and then continuously transported into the liquid air separation plants via a liquid pump or vapour boosting to replenish the cooling capacity and ensure continuous operation of the air separation unit. The use of circulating nitrogen (or air) to absorb the cold at the low temperat...

Mar 08, 2022

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